INSTRUCTION MANUALPRECISION MEASURING TOOLSGAP CALIPER

GVG-1

Model No.

Thank you for purchasing the Niigata Seiki Gap Caliper.
This precision instrument indicates measured value using a main scale with a vernier scale.
●For safe and proper use, please read this instruction manual before use and follow the procedures described. Please keep manual
where it is accessible to user for future reference.
●Keep this manual with the instrument if transferred or leased to a third party.
●For inquiries about this product, please contact dealer or place of purchase.

■PART IDENTIFICATION AND FUNCTION①Main Scale②Vernier Scale (Slide)000.05mm③Scale Lock Screw.6.4

10⑦Nut000.2.8⑥Jaw①Main Scale1mm · ‥‥‥‥ Graduation Main Scale②Vernier Scale (Slide) · ‥‥ 0.05mm Vernier Scale

Please see below for guide to reading the scale.

.4.6⑤Probe Holder

10.8.2④Clamp Screw⑧Probe③Scale Lock Screw‥‥‥‥ Locks Slide position④Clamp Screw‥‥‥‥‥‥ Secures Probe in position⑤Probe Holder ‥‥‥‥‥‥ Holds Probe⑥Jaw ‥‥‥‥‥‥‥‥‥‥ Probe Holder slides upon
⑦Nut ‥‥‥‥‥‥‥‥‥‥ For adjusting Zero-point⑧Probe ‥‥‥‥‥‥‥‥‥ Applied to object for measurement⑨Reference Surface · ‥‥‥ Measured value is height difference
between probe tip and this surface.

⑨Reference Surface

SAFETY PRECAUTIONS
Always follow the these marked operating procedures in order toprevent harm to yourself or others, and to prevent damage to property.

WA R N IN G

Please Observe
Denotes a prohibition –You MUST NOT do.

Denotes a requirement –You MUST do.

Indicates risk of personal injury or property damage if not followed.

Read the manual and follow the instructions.
・Use of product other than as described in the manual
may cause accident.
Use only for measuring.
・Use for any purpose other than measuring may
damage or wear the instrument. Improper use may
also cause accident.
Handle with Care.
・Do not drop or subject instrument to excessive shock.
Do not place under heavy objects. Improper handling
may cause damage or poor accuracy.
・Do not scratch instrument, for example by writing ID
number.

CALIBRATIONUse In Proper Environment.
・Please do not use instrument in rain or locations withexcessive humidity. Do not use at extreme high or lowtemperatures. Keep out of direct sunlight.
Probe Tip is Sharp – Handle With Care.
・Careless handling may cause injury.
Do not move the Vernier Slide when the Scale Lock
Screw is tightened.
・Excessive force applied to Slide may cause damage oraffect accuracy.
Do not disassemble or modify.
・Do not remove the Vernier Slide, Please do not attempt
to disassemble or modify as it may cause damage orpoor accuracy.

●In order to maintain instrument accuracy, it is recommended that
accuracy is confirmed through calibration on a periodic basis.
Wear of measuring surfaces from repeated use may affect accuracy andperiodic accuracy checks should be performed.

We provide calibration services.
Please contact agent in country ofpurchase to make arrangements.

PREPARATION FOR USE
Before using the caliper, follow the steps below:●Loosen the Scale Lock Screw.

Moving the Vernier Slide with the Scale Lock Screw tightened may cause excessive force to the Slide which will damage the caliper and affect accuracy.

●Make sure Nut is not loose.

If Probe Nut is loose, adjust Zero-Point setting on Vernier and secure Probe by tightening the Nut.

●Wipe off any dirt, or oil from Probe, Slide and Reference Surface.
Contamination of surfaces may cause damage or measurement error.

●Allow the caliper and object to be measured time to reach the same temperature.

A temperature difference between the object to be measured and the caliper may cause measurement error. Allow enough time for the temperatures toequilibrate.

●Performing an accuracy check.
①Set position of Probe Holder.

Loosen the Probe Clamp Screw and adjust position asdesired. Secure by tightening the Clamp Screw.

②Probe Check.

Make sure the Probe tip and Jaw are straight. Place theGauge on a flat surface and move the slide to position theprobe tip onto the surface.

Vernier Scale (Slide)※If Zero-Point is not set properly:

ReferenceSurface

Probe

Set the Zero point by loosening the Nut and adjusting theposition of the Probe until zero point is aligned. Tighten
Nut to secure.

10

10Clamp Screw
Probe Holder
Nut

In this position from step ②, the vernier scale marks
should line up with the main scale lines at position 0 and19 as shown.

00③Check for Zero Reading.

10

Flat Surface00.2.8.4.6.6.4.8.2

000.05mm

Scale Marks Align

READING THE SCALEPREVENTING ERRORSThe measured value is determined by reading the main scale,and then adding the Vernier Scale reading as determined by
the point where the vernier and main scale graduations align.

In order to prevent measurement error, please note the following.

Measured value =Main Scale Reading + Vernier Scale Reading●Do not change the position of the Probe Holder after theaccuracy check is performed. If position is changed, please
do another accuracy check.

10010010Example for Negative Reading
Read using lower vernier scale

1010 0 0 1010
0.050.05mm
mm.2.8.4.6.6.4.8.2000.05mm

M a i n S c a l e r e a d i n g : ー５．００
Vernier reading from upper scale : ー ．７０
Measurement : ー５．７０（mm）

SPECIFICATIONS
Model No.
Measurement Range
Resolution
Accuracy
Material

GVG-1-10 ~ 10mm
0.05mm±0.05mm
Stainless Steel.8.2.6.4.4.6000100.05mm
00.8.2

AFTER USE CARE ・ STORAGE0000

10000 .2.2 .4.4 .6.6 .8.800 .8.8 .6.6 .4.4 .2.2

1000

Scale should be read fromdirectly in front of the gauge.
Due to step in height of vernierscale relative to main scale, if
viewing direction is not directly
above the reading may haveparallax error.

.6.4

M a i n S c a l e r e a d i n g :７．００
Vernier reading from upper scale : ．３５
Measurement :７．３５（mm）

VIEWING THE SCALE
100.05mm.4.600.2.8.8.2

00.6.40.4.6

10.2.8

10000

1000 .2.2 .4.4 .6.6 .8.800 .8.8 .6.6 .4.4 .2.200000.050.05mmmm

10●Make sure the base is nottilted when taking ameasurement.

.2.8

Example for Positive Reading
Read using upper vernier scale

10000.05mm

PREVENTING ERRORS●Wipe measuring surfaces, sliding surfaces,
reference surface, and exterior with a dry cloth
treated with anti-corrosive oil.
When not in use, apply anti-corrosive treatment or keep inanti-corrosive bag.

●When not in use, keep lock screws slightly loose.
Thermal expansion during storage may cause over tightening
which may affect accuracy.

●Store in supplied case in a cool, dry location.
Keep away from direct sunlight or wet locations.

Niigata seiki Co., Ltd.
6-15-22, Tsukanome, Sanjo, Niigata, Japan, 955-0055
Tel. : +81-256-31-5660 Fax. : +81-256-39-7730

MAIL:intl.sales@niigataseiki.co.jp
URL http://www.niigataseiki.co.jp

I292-K1603